Synthesis and Optoelectronic Characterization of a Monochromic Red-Emitting Europium(III) Complex Containing Triphenylamine-Functionalized Phenanthroline
Synthesis and Optoelectronic Characterization of a Monochromic Red-Emitting Europium(III) Complex Containing Triphenylamine-Functionalized Phenanthroline
复制标题
DOI：
10.1021/jp109854b
复制
发表时间：
2011-02
影响因子：
3.7
通讯作者：
Yu Liu;Yafei Wang;Haipeng Guo;Mei-xiang Zhu;Chun Li;Junbiao Peng;Weiguo Zhu;Yong Cao
中科院分区：
文献类型：
--
作者：
Yu Liu;Yafei Wang;Haipeng Guo;Mei-xiang Zhu;Chun Li;Junbiao Peng;Weiguo Zhu;Yong Cao
设计、合成并表征了三苯胺功能化的Eu（DBM）3三元配合物（DTPA-Phen），其中DTPA-Phen为3，8-双[4-（二苯氨基）苯基]-1，10-邻菲咯啉，DBM为二苯甲酰甲烷根。该配合物在光激发下由于5D 0 → 7 Fj（j = 0−4）跃迁而发射三价铕离子的特征红光，并表现出高热稳定性（432 °C）。以该配合物为客体，以聚（9，9-二辛基芴）（PFO）沿着与2-（叔丁基苯基）-5-联苯基-1，3，4-恶二唑（PBD）共混物为主体，制备了高性能的双层聚合物发光器件（PLED）。在掺杂剂浓度为1 ~ 8wt%时，在这些器件中观察到峰值为612 nm、半峰全宽为10 nm的窄带宽红光发射。当电流密度为1.2 mA/cm ~ 2时，最高外量子效率为1.8%光子/电子，当电流密度为173.2 mA/cm ~ 2时，最大亮度为1333 cd/m ~ 2。
A triphenylamine-functionalized ternary europium(III) complex of Eu(DBM)3(DTPA-Phen), in which DTPA-Phen is 3,8-bis[4-(diphenylamino)phenyl]-1,10-phenanthroline and DBM is dibenzoylmethanato, was designed, synthesized and characterized. This complex emits the characteristic red emission of trivalent europium ion due to the 5D0 → 7Fj (j = 0−4) transitions under photoexcitation and exhibits high thermal stability (432 °C). Using this complex as a guest and a blend of poly(9,9-dioctylfluorene) (PFO) along with 2-(tert-butylphenyl)-5-biphenylyl-1,3,4-oxadiazole (PBD) as a host matrix yielded the double-layer polymer light-emitting devices (PLEDs) with high performance. The narrow-bandwidth red emission that peaked at 612 nm with a full width at half-maximum of 10 nm was observed in these devices at the dopant concentrations from 1 to 8 wt %. The highest external quantum efficiency of 1.8% photons per electron at a current density of 1.2 mA/cm2, with a maximum brightness of 1333 cd/m2 at 173.2 mA/cm2, was achi...